Feature: 1. Durable: The RC boat thruster is made of premium plastic and aluminum alloy, which is wear resistant, high strength and has more delicate in appearance. 2. Powerful Transmission Shaft: The motor adopts 4mm steel transmission shaft and propeller drive, and the shaft sleeve is equipped with 2 high speed bearings to make the shaft run smoothly. 3. Strong Power: The solid structure of the RC boat thruster jet pump set makes the hull more flexible. By reducing the impact of natural water flow, the set is very suitable for pushing the ship powerfully. 4. Practical: The surface is glossy and tidy with good performance, and moving forward and backward is support. This set adopts toothed wheel transmission, and antiskid nut are fastened to ensure the stability of the propeller and convenient maintenance. 5. Applicability: Equipped with 540 brush motor and heat dissipation pipe, the RC boat thruster is suitable for the refitting of various model boats and remote control boats, and can propel the hull of about 6‑8kg. Specification: Item Type: RC boat thruster Weight: Approx. 345g/12.2oz Project Type: RC accessory Thruster Material: Plastic, aluminum alloy Motor Material: Iron, copper Color: Gray Thruster Size: 150x43mm/5.9x1.7in Thruster Diameter: 26mm/1in Thruster Aperture: 3.175mm/0.13in Motor Model: 540 Working Voltage: 7.4V Maximum Speed: 23000 Length: 50mm/2in(Excluded shaft) Motor Diameter: 35mm/1.4in Motor Shaft Length: 12mm/0.5in Motor Shaft Diameter: 3.175mm/0.13in Propulsion: 6-8kg hull Applicability: Suitable for refitting various model ships and remotely operated ships . Package List: 1 Set x 26mm Propeller(13 accessories in total)1 x Motor Mounting Base1 x 540 Brush Motor1 x Radiator Tube1 x Rubber Tube30 x Screw1 x Nut1 x Assembly Instructions Note: 1. Please allow an error of 1‑3mm due to manual measurement. thank you!2. The calibration of the display is inconsistent, and the color of the items displayed in the photo may be slightly different from the actual object.